Brake-head.



C. W. ARMBRUST.

BRAKE HEAD.

PPPPPPPPPPPPPPPPPPPPPPPPPPP l lul k IL I l Patented Apr. 23, 1.912.

2 SHEETS-SHEET 2.

RMBRUST. R E HEAD.

APPLICATION FILED JULY 26, 1911.

M2M m maybeattached thereto. and also larly adapted' for use with shoesnarra raras rarita ric.

CHARLES W'.y BMBRUST, OF CRYSTAL LAKE, ILLINOIS, ASSIGNOR OF ONE-HALF TOHARRIET W. ARMBRUST, OF NORTH CRYSTAL LAKE, ILLINOIS.

BRAKE-HEAD.

Sp eccaton of Ietters Patent.

Application 1aed July as, 1911. serial No. 640,631

To all whom it may concern: f

Be it known that 1, CHARLES 'W. ARM- BRUsT, a citizen of Crystal Lake,in the county of McHenry and`State of Illinois, have invented certainnew and useful Improvements in Brake-Heads, of which the following is a.specication.. i

This invention relates :to `brake heads and aims to produce a device ofthis character so constructed that any of the well known types of brakeshoes, solid or interlocking7 particu provided with locking lugs, the'brake'head being provjded with undercut recesses with which the lockinglugs will-,interlockingly engage to hold 'the shoe to the hea-d andalsoprevent lateral displacement of the shoe rel-v ati vely to the hea d. Myinvention aims also to produce a brake head to. which a brake shoe canhe attached withoutthe employmentof the usual attaching key andwhich.will permit. the shoe to be attached by sliding the same into the brakehead from the side thereof but which permits a limited relative movementbetween the head and the shoe sufficient to eifect'locking engagement ofthe shoe and:

prevent the same from becoming laterally displaced.

My improved brake head is capable of usci vwith brake shoes havingeither integrallyv attached. lugs or detachable attaching lugs. Itembodies both strength and `durability and at the same time is asv lightin weight as is permitted by the strengthrequired and, furthermore, itis designed to meet-'all-flof the M. C. B. requirements.

Myl invention will be best understood by reference to the followingdescription when considered in connection wit-h the accompanyingdrawings illustrating those embodiments which, at the present time,appear to be preferable.

Referring to the drawings Figure 1 is a side elevation of a brake headembodying my invention and showing a pair of interlocking brake shoesatt-ached thereto; Fig. 2 is a face view of the brake 4head shown inFig. 1 with the brake shoes removed; Fig. 3 is a. back view of one ofthe shoes shown in Fig. 1; Fig. et is .a face View of the interlockingbrake shoe 19.

On t-he drawings 10 designates, in general,

the body ofthe brake head which is provided with the usual truss rodbearing 11, the hanger opening l2, andthe brake hook receiving opening13. The attaching prongs 14.- project downwardly on either side of thebrake beam bearing and each et the prongs is undercut at its base orprovided with a groove 15 for a purpose hereinafter described. Theend'prongs 16 have longer flat lower bearingfaces than isl customarywith the ordinary types ot brake head and each is provided on its lowerface, preferably at some distance from the end, with a transverselyextending locking recess 17 adapted to receive the locking lugs 18 of anThe entrance 20A of each of the recesses is preferably made just largeenough to receive the locking lugs 18, but beyond the ent-rance, therecesses arewidened or enlarged'as shown in Fig. 2 to permit of alimited longitudinal movement of the brake shoe relative to the brakehead. One end of the enlarged portion of therecess is closed, as shown,to prevent the'shoe from becoming laterally displaced relatively to thehead in that direction, while at 'the opposite end of the enlargedportion, shoulders 21 are formed which engage with the ends of thelocking lugs 18 when the shoe is moved slightly longitudinally of thebrake head to prevent the locking lugs from sliding out through theentrance 20, thereby holding the shoe against lateral displacement onthatside o t thebrake head. The shoe disclosed in Figs. 3 ande is of theinterlocking type which is adapted to be engaged with a similarly shapedshoe upon relative transverse movement of the shoes. The body portion ofthe shoe isprovided with the upwardly projecting attaching stud 22provided with a. groove 23 and one side of the shoe is recessed asindicated at 24 to receive the stud 22 of a similarly shaped shoe. Adepression 25 is formed adjacent the recess 24 to permit the detachableattaching lug 26 (Fig. '1) to be engaged `with the attaching studs 22 ofthe interlocked shoes. The face of the shoe is pro* vided with lockingrecesses 27 adapted to receive the locking lugs 18 of a similarly shapedshoe and also with locking recesses 28 to receive the attaching lugs 29of a similarly shaped shoe the latter also serving as thrust lugs whensaid shoe is locked to the brake head.

A groove. or depression 30 extends longitudinally o1 the brake head toreceive the locking key (not shown) in case it is desired to use suchkey and the attaching prongs 14 are provided with key-way openings 31through which the locking key passes. The detachable attaching lug 26 isprovided near its top with outwardly projecting ribs 32 adapted toengage in the grooves 15 formed at the base of the attaching prongs. Asshown in Fig. 1, the space between the attaching prongs 14 is largerthan the attaching lug 26 so that said lug may be moved with the brakeshoe longitudinally of the brake head to effect the 'locking engagementbetween the locking lugs 1S and the undercut walls of the lockingrecesses 17. The locking lugs and the attaching stud, by reason of theirsliding engagement with the brake head, are suflicient to securely lockthe brake shoes to the .brake head without the employment of anattaching key, but the brake head is adapted to be employed with shoesdifferent from that above described and is formed to accommodate theattaching key in case it is desirable to use a shoe requiring such key.

Then shoes are to be attached to the biake head they arc 'firstinterlockingly engaged with cach other by slipping the locking lugs 13and 29 into the locking recesses 27 and 2S respectively of a similarlyshaped shoe, the attaching stud 22 entering the re-A cess Q4 provided inthe side of the shoe. The detachable attaching lug 2G is then engagedwith the studs Q2 of each shoe by sliding the samelongitudinally of theshoes so that the ribs (not shown) lug is provided engage in the grooves23 of the studs 22. The interlocked shoes are then attached to the brakehead by sliding the same transversely of the head so that the lockingvlugs 1S 0n the upper shoe slip into the locking recesses 17 while theattaching lug` slides into the space between the attaching' prongs. Itwill be evident that slight longitudinal movement of the shoe in eitherdirection relatively to the brake head, will cause the ends of thelocking lugs 18 to engage behind the shoulders 21 and thus hold theshoes against lateral displacement relatively to the brake head.

"The brake head disclosed in Fig. 5 is substantially identical in allrespects with that previously described. The brake shoe 33, however, isnot of the interlocking type but is a cast shoe provided with theintegral attaching lug 34 and the locking lugs 35. A The attaching lugis provided with the transwith which theversely extending ribs 36adapted to en-V gage in the grooves 15 of the brake head and the lockinglugs 35 are shaped to engage in the locking recesses 17 of the brakehead. In order to strengthen the shoe and to hold the parts together incase the shoe should become cracked or fractured, I have providedreinforcing members 37 extending 'longitudinally of the shoe adjacentthe back thereof, the end members being bent upwardly as indicated at38, Within the thrust lugs if preferred. These members also serve tomaterially strengthen the bases of the locking lugs 35 so that the vsaidlugs will not be broken away from the shoe body when the shoe vis nearlyworn away. The back of the shoe is elevated at the center, as

.indicated at 3S, and at theends, as indicated at 39, for the purpose ofspacing the prongs of the brake head away from the body of the shoe sothat the shoe may be Worn entirely away without wearing into the brakehead.

In Fig'. 8 I haveshown a brake shoe 40, substantially similar in allrespects to the brake shoe 33 shown in Figs. 5, 6 and `7, except thatthe reinforcing elements 37 are omitted. The attaching lugs 34 of bothof these shoes are preferably provided with a key-way opening 41 4toreceive an attaching key if it should be found desirable to use same.

It will be evident that shoes of other types y than those shown anddescribed may be employed with my improved brake head and that while theattaching key is not necessary to lock those types ofshoes to the brakehead, said headis constructed to receive a locking key and such key maybe used in case it is required by the character of the shoe employed. A

It willA be apparent that the brake head itself is capable ofconsiderable modification without departing from the spirit of orsacrificing any of the material advantages of the invention.

I claim:

1. A brake head provided with locking recesses adapted to receive thelocking lugs of a brake shoe and undercut to permit limited longitudinalmovement of the shoe relatively to the brake head.

2. A brake head provided with' locking' the shoe relatively of a brakeshoe, 'being smaller than the main portion thereingly engaged .with

gagement with the attaching lug and locking lugs of a brakeshoe, and abrake shoe comprising a body portion provided with integral locking lugsand an integral att .taching lug interlockingly engaged with said brakehead, said shoe being capable vided with recessesadapted to receive thelocking lugs of a brake shoe, said recesses being provided withshoulders to preventv lateral displacement of lthe shoe relatively tothe brake head.

5. A brake head provided with locking recesses adapted to receive thelocking lugs of a brake shoe,l and having means integral therewith toprevent lateral displacementof locked against lateral displacementrelative to the brake head. to the'brake head.

.6. A brake head provided with locking 10. The combination of a brakehead comrecesses adapted to receive the locking lugs prising attachingprongs and end prongs, the entrance to said recesses each of saidattaching prongs being pro- -vided with grooves and each of said endprongs being provided with locking recesses, and/a brake shoe comprising'a body portion having a reinforcing element embedded therein andlocking lugs and an attaching lug formed integrally with said bodyportion, said attachinglug being interlockingly lengaged with thegrooves in said attaching prongs and said locking lugs beinginterlocking engaged in said recesses of the end prongs and saidrecesses having shoulders for engagement with the ends otsaid lockinglugs to prevent -lateral displacement of the brake shoe relative to thebrake head.

ll.y A brake head having attaching prongs and end prongs spaced apart, esaid end prongs and attachingy prongs being provided with recesses toreceive the locking lugs of abrake shoe and permit limited longitudinalmovement of the shoe Vrelatively to the brake head.

CHARLES W. ARMBRUST. Witnessesz' IRA J. WILSON, M. ROBERTSON.

to the` brake head, whereby the shoe is of, whereby to permit limitedlongitudinal movement of the brake shoe relatively to the brake head andprevent lateral displacement of said shoe.

7. A brake head comprising attaching prongs and end prongs, saidattaching prongs being provided with grooves for interlocking engagementwith the attaching lug of a brake shoe, said end prongs having lockingrecesses adapted to receive the locking lugs of a brake shoe and formedto engage with the ends of said locking lugs to prevent lateraldisplacement of the shoe.

8. The-combination ofya'brake head provided wit-h transversely disposedlocking recesses adapted to receive the similarly disposed locking lugsof a brake shoe, and a brake shoeV having locking lugs interlocksaidrecesses, but capable of longitudinal movement whereby lateraldisplacement of said shoe relatively to said brake head is prevented.

9. The combination of a brake head comprisingattaching prongs and endprongs having locking recesses for interlocking en- Copies of thispatent may bev obtained for five centseach, by addressing theCommissioner of'Patents, Washington, D. G.

of limited longitudinal movement relatively

